Water-seal trap.



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GEORGE A. HALLY, OF DENVER, COLORADO.

WATER-SEAL TRAP.

N0. 798.507. Specification of Letters Patent. Patented Aug. 29, 1905.

Application filed May 15, 1905. Serial No. 260,405.

Having briefly outlined my improved construction, I will proceed todescribe the same in detail, reference being made to the accompanyingdrawings, in which is illustrated an embodiment thereof.

In the drawings, Figure 1 is a side elevation of a trap equipped with myimprovements. Fig. 2 is a vertical longitudinal section taken throughthe same.

device. Fig. 4 is a fragmentary sectional To (all Inherit il; 777/(I/I/(lo/warn Be it known thatLGnoReE A. HALLY, a citizen of the UnitedStates, residing in the city and county of Denver and State of Colorado,have invented certain new and useful Improvements in ater-Seal Traps;and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to the figures of reference markedthereon,which form a part of this specification.

My invention relates to improvements in traps of the character whereby awater seal is provided to prevent the passage of air or gases.

The object of my present improvement is to do away with washers for usein connection with traps provided with closures in order to form a tightjoint.

My further object is to place the threads of the closure and the ferruleor ring applied to the top of the trap beyond the reach of the gases inthe pipe system with which the trap is connected.

The body of traps of this character is usually composed of lead, a brassring being applied to the top of the lead trap and provided Fig. 3 is atop view of the view similar to Fig. 2, the parts, however, being shownon a larger scale.

In traps of ordinary construction the brass ring is placed inside of thetop of the lead trap, and the ring is secured to the lead by solderingon the inside. This gives the gas access to the solder, resulting in theeating away of the latter, whereby the ring soon becomes loose. Anadditional advantage of my construction over other traps is that thesolder is all on the outside,where the gas cannot possibly come incontact therewith.

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate the body of the trap, which, as heretoforeindicated, is composed of lead, the same being bent or spun inwardly atthe top to form a shoulder 6 and then carried upwardly inside of thebrass ring with threads engaged by the threads of the 7, forming abeveled surface, as shown at 8, trap-screw, the latter being alsousually made the lead being finally bent or spun over the of brass. Indevices of this character in com-- upper edge of the ring 7, as shown at9. The

screw-threads are formed on the ring, as shown at 10.

The closure 12 is provided with a depend ing flange 13, interiorlythreaded to engage the threads of the ring. The closure is also providedwith a depending auxiliary flange 14, formed concentric with thescrew-flange and having its outer surface beveled to cooperate with thebeveled portion 8 of the lead to form a fluid-tight joint as the closureis screwed into place. There is a narrow space between the two flanges13 and 14C to receive the ring 7 and the lead applied thereto, asheretofore explained. This lead is suflioicntly soft to form a tightjoint when engaged by the flange 14: of the closure, the same beingscrewed tightly down against the lead seat. Below the threaded portion10 of the ring 7 the ring is unthreaded or plain, as shown at 15,permitting the use of solder in order to more securely fasten the ringin place. To facilitate this the plain portion is made slightly mon usethe screw-threads are formed on the the outside of ring or ferrule atthe top of the cap in such a manner that after the cap-screw is appliedthe gases will have access to the threads, whereby these parts are socorroded that it is very diiiicult to remove the trap-screw withoutdestroying the trap. In my improved construction the lead forming thebody of the trap is bent or spun inwardly, forming a shoulder below thebrass ring, and then upwardly on the inside of the ring, and finallyover the upper edge thereof, the part of the lead on the inside of thering being beveled to cooperate with a depending circumferential flange,of the trap-screw to form a tight joint. In this case the screw threadsare formed on the outside of the brass ring, and the depending threadedflange 0f.the closure engages these threads, thus completely removingthe threads from access of the gases within the trap or system withwhich the latter is connected.

smaller in diameter than the threaded part of the ring, whereby a betteropportunity is given for applying the solder.

Having thus described my invention, what I claim is 1. The combinationof a trap composed of soft metal, a ring applied to the trap, the metalcovering the ring on the inside of the trap, and a closure havingathreaded portion engaging the ring exteriorly, and provided with anauxiliary flange engaging the soft metal on the inside of the ring andforming a tight joint.

2. The combination with a trap-body composed of lead, and a ring appliedto the top of the trap, the lead of the trap being carried inwardlybelow the ring, upwardly on the inside of the ring and extending overthe upper edge thereof, and a closure having a depending threadedflange, the outer surface of the ring being threaded to receive thethreads of the flange of the closure, the latter beingalso provided witha depending auxiliary flange of smaller diameter than the screw-flangeand engaging the lead inside of the ring whereby a tight joint isformec.

3. In a device of the class described, the combination of a receptaclecomposed of soft metal, a ring of harder metal applied to the top of thesoft-metal receptacle, the soft metal being bent or spun inwardly toform a shoulder upon which the ring rests, the soft metal being alsocarried upwardly on the inside of the ring which is beveled ring beingexteriorly threaded, a portion of its width, and a closure having athreaded flange engaging the threads of the ring and a plain flangeengaging the soft metal on the inner surface of the ring.

4. In a device of the class described, the combination of a water-sealtrap, and a ring of harder metal applied to the upper part of the trap,the soft metal of the trap being bent or spun inwardly to form ashoulder which the lower edge of the ring engages, the inner surface ofthe ring being beveled and its outer surface threaded, the soft metal ofthe trap to form a seat, the

being applied to the inner surface of the ring and extending over itsupper edge, the trap havinga threaded flange engaging the threads of thering, and a plain flange exteriorly beveled to engage the soft metal onthe inner surface of the ring, substantially as described.

5. In a device of the class described, the combination of a lead trap, aclosure and a ring, the upper part of the trap beingspun inwardlyforming a shoulder for the ring, carried upwardly on the inner surfaceof the ring and overlapping the upper edge of the latter, the ring beingexteriorly threaded and having a plain part below the thread to permitthe use of solder exteriorly, the closure having a depending threadedflange engaging the threads of the ring, and a depending plain flange ofless diameter engaging the soft metal on the inner surface of the ring.

6. A soft-metal trap having an exteriorlythreaded ring of harder metalapplied thereto, the lead covering the inner surface of the ring, and aclosure having two centric flanges, the larger flange being threaded toengage the ring-threads, the smaller flange engaging the soft metal onthe inside of the ring.

7. A lead trap having a brass ring surrou nding the lead at the opening,the ring being exteriorly threaded, and a closure having separatedflanges passing on opposite sides of the trap around the opening, theouter flange being threaded.

8. A lead trap having an exteriorly-threaded strengthening-ringsurrounding the lead and held in place thereon around the opening, and aclosure having plain and threaded flanges of unequal diameter, thelarger flange engaging the exterior threads formed on the ring, and thesmaller flange engaging the lead on the inside of the ring.

In testimony whereof I aiflx my signature in presence of two witnesses.

GEORGE A. HALLY.

Witnesses: DENA NELSON, A. J. OBRIEN.

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